JP2014066128A - Ceiling material and ceiling material fixing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ceiling material in which cracks are not generated, which does not break and drop in a case of occurrence of an earthquake, is excellent in safety, and also excellent in fireproofness and ceiling material fixing structure.SOLUTION: A ceiling material 100 is formed by coating the front face, the rear face and the peripheral end face of a corrugated cardboard panel material 102 with a core material part 101 formed by alternately sticking a plurality of middle cores 10, 11a, 11b and a plurality of middle liners 12a, 12b like a laminate, and outer liners 13a, 13b stuck to the front face and the rear face of the core material part 101 by aluminum foil 103, respectively. The mass of a material forming the outer liners 13a, 13b per unit area is 210 g/m, the mass of a material forming the middle cores 10, 11a, 11b per unit area is 180 g/m, and the mass of a material forming the middle liners 12a, 12b per unit area is 210 g/m.

Description

  The present invention relates to a ceiling material used as a material constituting a flat portion of a ceiling in various buildings and a fixing structure thereof.

  Conventionally, gypsum board materials have been widely used as ceiling materials in buildings. Various methods have been proposed and constructed for the ceiling structure using a gypsum board, and a typical example is a grid ceiling as shown in FIG. In the grid ceiling, a plurality of frame members 90 whose sections are inverted T-shaped at the lower ends of a plurality of suspension bolts (not shown) fixed in a suspended manner to a building frame (not shown) in the horizontal direction In addition, after forming the lattice structure by attaching at regular intervals in the vertical and horizontal directions, a gypsum board material 92 is fitted from above the lattice structure into a rectangular region surrounded by the plurality of frame members 90, and the gypsum board material It is fixed by engaging a stepped stepped portion 93 provided at the peripheral portion of 92 along the frame member 90.

  On the other hand, as a prior art related to the present invention, for example, a ceiling material in which a metal foil is fixed to the front and back surfaces of a corrugated cardboard material has been proposed (see Patent Document 1).

Japanese Utility Model Publication No. 47-33536

  Gypsum board material is non-flammable, so when used as a ceiling material, it exhibits excellent fire resistance, but because of its heavy weight, the physical burden on workers during transportation and construction is large, and workability is high. Is not good.

  In addition, gypsum board material is not only heavy but also brittle and has little flexibility. If an external force is applied to the gypsum board material that forms the ceiling due to rolling, etc. during an earthquake, the gypsum board material will crack. In many cases, the entire plasterboard material or fragments fall into the room. That is, as shown in FIG. 16 (b), when the building shakes strongly at the time of the earthquake, the lattice structure fixed to the suspension bolts suspended from the building's housing also shakes greatly like a pendulum. In addition, since the gypsum board material 92 cannot absorb the external force applied to the gypsum board material 92, the gypsum board material 92 is cracked and frequently falls to the indoor side.

  On the other hand, the ceiling material described in Patent Document 1 is lighter than the conventional gypsum board material, but since the peripheral end surface of the corrugated cardboard material is in contact with air, a flame may reach the ceiling material portion in the event of a fire. When the temperature becomes high, there is a possibility of burning from the peripheral end surface in contact with air. In addition, since the peripheral edge surface of the ceiling material described in Patent Document 1 is not treated, if the surrounding air becomes highly humid, moisture may be absorbed from the peripheral edge surface in contact with the air, and the strength may be reduced. is there.

  Therefore, the problem to be solved by the present invention is to provide a ceiling material that is excellent in safety and fire resistance without cracking or cracking and falling when an earthquake occurs, and a fixing structure thereof. There is.

  The ceiling material of the present invention has a non-combustible material for the surface, back surface and peripheral end surface of a corrugated board material provided with a core material portion constituting a hollow air layer and an outer liner attached to the surface and back surface of the core material portion. The mass per unit area of the material forming the outer liner is equal to or more than the mass per unit area of the material forming the core member. In addition, when the corrugated plate member is included in the core part, the mass per unit area of the corrugated plate member is per unit area when the flat plate member is processed into the corrugated member. Of mass. Further, the corrugated board material is not only a single-layer structure in which one corrugated member is sandwiched as a core part between a plurality of outer liners, but a plurality of core parts are provided between a plurality of outer liners. This includes a multilayer structure in which corrugated plate members and intermediate liners are alternately held.

  In the corrugated board material, the mass per unit area of the material forming the outer liner and the mass per unit area of the material forming the core part are one of the major factors that affect the rigidity. The larger the mass per unit area of the material forming the material part, the harder and more rigid it tends to be hard to deform.

  Therefore, with the above-described configuration, both the front and back surfaces of the core portion constituting the corrugated board material are sandwiched between outer liners having higher rigidity than the core portion, so when arranged on the ceiling portion, The hard and rigid outer liner can stably maintain a fixed shape as a ceiling material, and it is softer and less rigid than the outer liner when subjected to a large external force due to rolls in the event of an earthquake. Since it absorbs external force while deforming together with the outer liner, it can be prevented that the ceiling material is cracked or cracked and dropped. Further, even if the ceiling material falls, it is lighter than the gypsum board material, so that the risk of damaging people and articles is greatly reduced.

  Further, since the front, back and peripheral end surfaces of the corrugated board material are coated with a non-combustible material, and the corrugated board material is not exposed to the air, it is difficult to burn in the event of a fire and is excellent in fire resistance. Since the material of the corrugated board material is not limited, it can be formed by a paper material, a synthetic resin material, a combination of a paper material and a synthetic resin material, or a mixed material of a paper material and a synthetic resin material.

Here, the mass per unit area of the material forming the core part is 100 to 180 g / m ² , and the mass per unit area of the material forming the outer liner is 180 to 500 g / m ^2. Is desirable.

  With such a configuration, the rigidity and the shock absorption are well balanced.

  Furthermore, it is desirable that the core member is formed by alternately laminating a core and a liner.

  With such a configuration, since the core part has a multilayer structure, it is effective in improving rigidity and can also enhance the heat insulating effect.

  Moreover, what provided the step-shaped step part in the peripheral part as the said corrugated board board | plate material can also be used.

  Thus, by providing a stepped step portion on the peripheral edge portion of the corrugated board material, it can be easily applied to a grid ceiling that has been widely constructed conventionally, and therefore versatility is enhanced.

  Since the method for forming the stepped portion is not limited, for example, a method of forming the peripheral portion of the corrugated board material by compressing, a method of cutting a part along the peripheral portion of the corrugated board material, or It can be formed by a method of bonding a plurality of corrugated board materials having different sizes.

  On the other hand, a hinge part that can be bent in a hinge shape is provided on a part of the corrugated board material, and the end face of the corrugated board material facing the hinge part may be covered with a noncombustible material.

  With such a configuration, if the hinge portion is arranged on the ceiling portion in the building in such a manner that it bends in a mountain shape upward, the ceiling member is attached to the locking member like a system ceiling or a grid ceiling, for example. In the case of a ceiling with a method of mounting and fixing, the whole is bent into a mountain shape by simply pushing up the hinge part from the indoor side of the building, and an opening facing the back of the ceiling is formed in the area where the ceiling material is arranged. Inspection and maintenance on the back side becomes easy.

  Moreover, an aluminum foil can be used as the noncombustible material.

  With such a configuration, when the ceiling material is disposed on the ceiling portion, the heat shielding function between the back of the ceiling and the room can be enhanced, so that it is effective in improving the efficiency of indoor air conditioning, and the core material Since the heat insulation layer by air is formed in the part, it is possible to prevent heat from entering from the back of the ceiling and enhance the heat insulation in the living room. Furthermore, the moisture impermeability of the aluminum foil can prevent moisture from entering the corrugated board material, so that the ceiling material can be prevented from being deformed or bent, and the strength is not impaired.

  Furthermore, a decorative paper or a decorative film can be attached to at least one surface of the ceiling material described above.

  If it is set as such a structure, designability can be improved by selecting and sticking the decorative paper and the decorative film which have the external appearance and color tone suitable for the construction place. In addition, although the surface which sticks a decorative paper and a decorative film may be only the surface which faces the room | chamber interior when the said ceiling material is installed, it can also stick on both surfaces.

  Furthermore, a frame material can be attached to the peripheral portion of the ceiling material described above.

  If it is set as such a structure, when fixing the said ceiling material to a locking member with a screw member, it can suppress that a screw member penetrates a ceiling material by inserting a screw member in the said frame material. In addition, if a screw hole is provided in the frame material in advance, an effect of preventing forgetting to fix the screw when fixing to the locking member can be obtained. Since the material of the frame material is not limited, it can be made of metal (for example, aluminum) or synthetic resin, but is preferably made of synthetic resin.

  Next, in the ceiling material fixing structure of the present invention, the peripheral portion of the ceiling material according to any one of claims 1 to 8 is provided in a locking member disposed in a substantially horizontal direction on a ceiling portion in a room of a building. In the structure in which the ceiling member is fixed to the locking member by the screw member by abutting from the inside and screwing the screw member from the ceiling material toward the locking member, the locking member and the A stopper is provided between the screw member, an outer periphery of the screw member, or between the locking member and a locking depth that defines a screwing depth in the axial direction of the screw member with respect to the locking member. Here, the screwing depth refers to the degree of progress of the screw member in the pitch direction with respect to the screw hole when the screw member screwed into the screw hole is rotated and tightened.

  With such a configuration, when the ceiling member is fixed to the locking member arranged on the ceiling portion with the screw member, when the screw member is rotated from the ceiling material toward the locking member, The screwing depth of the member is defined by the stopper, and the screw member is prevented from further proceeding in the tightening direction (pitch direction). Therefore, the screwing depth corresponding to the thickness of the ceiling material is set in advance. It is possible to suppress the screw member from sinking into the ceiling material.

  Here, as the stopper, a cylindrical sleeve interposed between the screw hole and the screw member, a large-diameter portion formed on the outer periphery of the screw member, or a cylindrical shape arranged on the inner periphery of the screw hole Inserts can be used.

  With such a configuration, it is possible to obtain a reliable sag prevention function without significantly changing the shape of the ceiling material.

  According to the present invention, there is no cracking at the occurrence of an earthquake, it does not break and fall, it is excellent in safety, there are few falling off from the peripheral end surface during transportation and construction, and ceiling material excellent in fire resistance The fixing structure can be provided.

It is a partially cutaway perspective view showing the ceiling material according to the first embodiment of the present invention. FIG. 2 is a partially omitted sectional view taken along line AA in FIG. 1. It is a vertical sectional view which shows the state which constructed the ceiling material shown in FIG. It is a schematic diagram which shows the state which the ceiling material shown in FIG. 3 received the roll. It is a perspective view which shows the ceiling material which is 2nd Embodiment of this invention. It is sectional drawing in the BB line in FIG. It is a partially-omission perspective view which shows the construction state of the ceiling material shown in FIG. It is a vertical sectional view showing a construction state of the ceiling material according to the third embodiment of the present invention. It is a partially omitted vertical sectional view showing a ceiling material mounting structure according to a fourth embodiment of the present invention. It is a partially omitted vertical sectional view showing a ceiling material mounting structure according to a fifth embodiment of the present invention. It is a partially omitted vertical sectional view showing a ceiling material mounting structure according to a sixth embodiment of the present invention. It is a partially omitted vertical sectional view showing a ceiling material mounting structure according to a seventh embodiment of the present invention. It is a partially omitted sectional view showing a ceiling material according to an eighth embodiment of the present invention. It is a perspective view which shows the ceiling material which is 9th Embodiment of this invention. FIG. 15 is a partially omitted vertical sectional view showing a mounting structure of the ceiling material shown in FIG. 14. It is a schematic diagram which shows the state in which the gypsum board material which comprises the conventional grid ceiling received the roll.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the ceiling material 100 according to the first embodiment of the present invention has a plurality of middle cores 10, 11 a, 11 b and a plurality of middle liners 12 a, 12 b alternately laminated in a laminated form. The front surface, the back surface, and the peripheral end surface of the corrugated board member 102 provided with the core material portion 101 formed and the outer liners 13a and 13b attached to the front surface and the back surface of the core material portion 101 are each one of non-combustible materials. It is formed by covering with a certain aluminum foil 103.

  The core part 101 has middle liners 12a and 12b attached to the front and back surfaces of the core 10, respectively, and the outer liners 13a and 11b are respectively attached to the upper surface of the middle liner 12a and the lower surface of the middle liner 12b via the cores 11a and 11b. It is formed by sticking 13b, and this core part 101 constitutes a hollow air layer. Further, a stepped stepped portion 102 a is formed on the peripheral end surface of the corrugated board member 102 over the entire circumference, and these stepped portions 102 a are all covered with the aluminum foil 103. Furthermore, a decorative paper or a decorative film (not shown) is attached to the lower surface of the ceiling material 100 (the surface facing the room).

The mass per unit area of the material forming the outer liners 13a, 13b is 210 g / m ² , and the mass per unit area of the material forming the cores 10, 11a, 11b is 180 g / m ^2. The mass per unit area of the material forming 12a and 12b is 210 g / m ² . Moreover, the mass per unit area of the ceiling material 100 is 1940 g / m ² .

  Note that the mass per unit area of the material forming the cores 10, 11a, 11b, which are the corrugated members described above, is the flat member before these members are processed into the corrugated members. The mass per unit area. However, the mass per unit area after processing the flat plate member into the corrugated plate member (mass per unit area on the projection plane parallel to the corrugated plate member) is the unit area of the flat plate member before processing. It is equivalent to about 1.5 times the mass of. Although the size and shape of the ceiling material 100 are not limited, the ceiling material 100 of the present embodiment has a square shape with a side length of about 600 mm when the shape in plan view is a square, and the thickness is about 13 mm. There is, but is not limited to this.

  Here, based on FIG. 3, the case where the ceiling material 100 is constructed on a grid ceiling is demonstrated. As shown in FIG. 3, a plurality of frames in which the cross section fixed to the lower end portions of a plurality of suspension bolts (not shown) attached in a hanging manner to a building frame (not shown) forms an inverted T-shape. A lattice structure is formed by attaching the material 20 in the horizontal direction at regular intervals in the vertical and horizontal directions, and the ceiling material 100 is fitted from above the lattice structure into a quadrangular region surrounded by the plurality of frame members 20. The stepped step portion 102 a formed at the peripheral portion of the ceiling material 100 is fixed by being engaged along the corner edge of the frame member 20.

  Since the ceiling member 100 has a structure in which both front and back surfaces of the core member 101 constituting the corrugated board member 102 are sandwiched between outer liners 13a and 13b having higher rigidity than the core member 101, as shown in FIG. When constructed, the fixed shape can be stably held by the hard and rigid outer liners 13a and 13b.

  As shown in FIG. 4, when the ceiling member 100 receives a large external force due to the roll S when an earthquake occurs, the core material part 101 that is softer and less rigid than the outer liners 13a and 13b is formed into the outer liners 13a and 13b. Since the external force is absorbed while being deformed together with 13b, it is possible to prevent the ceiling material 100 from being cracked or cracked and dropped.

  Further, since the corrugated board material 102 is not exposed to the atmosphere, it is difficult to burn when a fire breaks out and is excellent in fire resistance. The material of the corrugated board 102 in the ceiling material 100 is a paper material, but is not limited to this, and is not limited to this. Can be formed. Moreover, since it is not limited to the aluminum foil 103, nonflammable materials, such as other metal foils (for example, copper foil and tin foil), can also be used.

The mass per unit area of the material forming the outer liners 13a, 13b is 210 g / m ² , and the mass per unit area of the material forming the cores 10, 11a, 11b is 180 g / m ^2. Since the mass per unit area of the material forming 12a and 12b is 210 g / m ² , when used as a ceiling material, as shown in FIGS. Can be effectively prevented.

  Since the core part 101 has a multilayer structure formed by alternately laminating a plurality of middle cores 10, 11a, 11b and a plurality of middle liners 12a, 12b, the rigidity is high and the heat insulating action is also good. It is.

  Further, since the corrugated board member 102 has a stepped step portion 102a on its peripheral end surface, as shown in FIG. 3, it can be easily adopted for a grid ceiling that has been widely constructed conventionally. Also excellent in versatility. Although not shown, a decorative paper or a decorative film can be attached to the front and back surfaces (exposed surface of the aluminum foil 103) of the ceiling material 100. If it is set as such a structure, designability can be improved by selecting and sticking the decorative paper and the decorative film which have the external appearance and color tone suitable for the construction place.

  Next, based on FIGS. 5-7, the ceiling material 200 which is 2nd Embodiment of this invention is demonstrated. As shown in FIG. 5 and FIG. 6, the ceiling material 200 has a quadrangular shape in plan view, and the front, back, and peripheral end surfaces of the corrugated board material 202 whose peripheral end surface forms a flat surface are covered with the aluminum foil 103. Is formed. Since the other portions are the same as those of the ceiling material 100 shown in FIG. 1, the same reference numerals as those in FIGS.

  As shown in FIG. 7, when the ceiling material 200 is constructed, the ceiling material is attached to the locking member 32 attached to the lower end portions of the plurality of hanging members 30 attached in a hanging manner to a building frame (not shown). The peripheral part of 200 is brought into contact, the ceiling material 200 is inserted from the indoor side, and the screw 31 which is one of the screw members is screwed to the locking member 32 to be fixed.

  When there is a facility for installing a lighting fixture or the like on the ceiling portion where the ceiling material 200 is to be constructed, the corrugated board material 202 constituting the ceiling material 200 can be cut with a cutter knife or the like, and thus processing for forming an opening is easy. . In addition, it can be applied to repair work, earthquake countermeasures, or construction focused on improving heat insulation, and is low in cost.

  Next, the ceiling material 300 which is 3rd Embodiment of this invention is demonstrated based on FIG. As shown in FIG. 8, the ceiling material 300 is provided with a hinge portion 301 that can be bent in a hinge shape in a part of the cardboard plate material 302 that constitutes the ceiling material 300, and the cardboard plate material 302 that faces the hinge portion 301. The end surface 302 a is formed by covering with an aluminum foil 103. The hinge portion 301 is formed by sticking a flexible sheet material 303 (for example, decorative paper) on the lower surface side (indoor side) of the ceiling material 300.

  As shown in FIG. 8, when the ceiling material 300 is constructed, if the hinge part 301 is arranged so as to be bent in a mountain shape upward, the ceiling material 300 as a whole is simply formed by pushing up the hinge part 301 from the indoor side of the building. Since the opening facing the back of the ceiling is formed in the arrangement area of the ceiling material 300, the inspection and maintenance of the back of the ceiling are facilitated. Moreover, the part in which the ceiling material 300 is arrange | positioned can be utilized as a ceiling inspection port. Since the other portions are the same as those of the ceiling material 100 shown in FIG. 1, the same reference numerals as those in FIGS.

  Since the ceiling materials 100, 200, and 300 are formed of a corrugated board material and an aluminum foil, they can be separated and recycled after use. Therefore, the ceiling materials 100, 200, 300 recovered from the construction site after being deformed or damaged in the event of an earthquake or the like have good recyclability and are more burdensome on the natural environment than gypsum board materials that are extremely difficult to recycle. Is also small. In addition, the ceiling material 100,200,300 mentioned above illustrates this invention, and the ceiling material of this invention is not limited to these ceiling materials 100,200,300.

  Next, the ceiling material fixing structures 400, 500, 600, and 700, which are the fourth, fifth, sixth, and seventh embodiments of the present invention, will be described with reference to FIGS. 9 to 14, parts common to the ceiling materials 100, 200, and 300 described above are denoted by the same reference numerals and description thereof is omitted.

  In the ceiling material fixing structure 400 shown in FIG. 9, the periphery of the ceiling material 200 shown in FIG. 5 and FIG. 6 is attached to the locking member 40 (C channel material) arranged in a substantially horizontal direction on the ceiling portion in the room of the building. The head part 53 of the screw 50 is brought into contact with the portion directly below the locking member 40 of the ceiling member 200 from the indoor side. When the screw 50 is rotated, the screw 50 is a drill screw. Therefore, the screw hole 210 is formed in the ceiling material 200, the screw hole 41 is formed in the locking member 40, and is screwed as it is. Is fixed to the locking member 40.

  The sleeve 51 is a cylindrical member that is interposed between the screw hole 210 and the screw portion 52 of the screw 50. The screw 51 is inserted into the screw hole 210 through the sleeve 51, and the screw exposed from the sleeve 51. The tip of the portion 52 is screwed to the locking member 40.

  When the head 53 of the screw 50 is tightened while rotating, as shown in FIG. 9, the distal end side of the sleeve 51 contacts the locking member 40, and the head 53 of the screw 50 is placed on the proximal end side of the sleeve 51. It becomes impossible to fasten when the diameter-expanded portion comes into contact. That is, the sleeve 51 defines the screwing depth in the axial direction (pitch direction) of the screw 50 with respect to the screw hole 41 of the locking member 40 so that the screw 50 does not advance further in the tightening direction (pitch direction). Be blocked. Therefore, by determining the length of the sleeve 51 (the length in the axial direction) according to the thickness of the ceiling material 200 and setting an appropriate screwing depth in advance, the head 53 of the screw 50 is attached to the ceiling. Indentation into the material 200 can be prevented.

  Next, in the ceiling material fixing structure 500 shown in FIG. 10, as described above, the tip of the screw 50 with the sleeve 60 is brought into contact with the portion directly below the locking member 40 of the ceiling material 200 from the indoor side. When the head 53 is twisted while being rotated, a screw hole 210 is formed in the ceiling material 200, and a screw hole 41 is formed in the locking member 40 and is screwed as it is.

  In the ceiling material fixing structure 500, a cylindrical sleeve 60 as a whole is interposed between the screw hole 210 and the screw portion 52 of the screw 50, and the front end side of the sleeve 60 (the side in contact with the locking member 40). Is provided with a taper portion 61 whose thickness is gradually reduced by gradually increasing the diameter of the inner peripheral side of the sleeve 60 toward the distal end side. The screw 50 is inserted into the screw hole 210 in a state of being inserted into the sleeve 60, and the distal end portion of the screw portion 52 exposed from the sleeve 60 is screwed to the locking member 40. Since the screwing depth of the screw 50 is defined by the length of the sleeve 60, the head 53 of the screw 50 can be prevented from sinking into the ceiling material 200 as described above.

  Further, since the front edge portion of the sleeve 50 is sharpened by providing the tapered portion 61 on the distal end side of the sleeve 50, it becomes easy to penetrate the ceiling material 200 during the tightening operation, and the screw hole 210 is formed. It becomes easy. Further, since the tapered portion 61 is provided, the inner periphery on the distal end side of the sleeve 60 has a shape that gradually increases in diameter toward the distal end side. Therefore, during the tightening operation, the screw hole 41 of the locking member 40 The effect of not hindering formation is also obtained.

  Next, in the ceiling material fixing structure 600 shown in FIG. 11, a screw 56 in which a large-diameter portion 55 having an outer diameter larger than that of the tip screw portion 54 is integrally formed between the head 53 and the tip screw portion 54 is used. The ceiling member 200 is fixed to the locking member 40. Similarly to the above, when the tip screw portion 54 of the screw 56 is brought into contact with the portion directly below the locking member 40 of the ceiling material 200 from the indoor side and the head 53 of the screw 56 is screwed in while rotating, A screw hole 210 is formed, a screw hole 41 is formed in the locking member 40, and is screwed as it is.

  Further, when the tip screw portion 54 of the screw 56 is screwed into the screw hole 41 of the locking member 40 and tightened, the screw 56 cannot be tightened when the tip of the large diameter portion 55 contacts the locking member 40. The head 53 of the screw 56 can be prevented from sinking into the ceiling material 200. The length of the large-diameter portion 55 (length in the axial direction) can be set according to the thickness of the ceiling material 200.

  Next, the ceiling material fixing structure 700 will be described with reference to FIG. In FIG. 12, the screw hole 41 is displayed before the screw 50 is screwed onto the locking member 40, but this is an expression for convenience of explanation, and as described later, the screw hole 41 is It is formed by screwing the screw 50 into the locking member 40.

  As shown in FIG. 12, in the ceiling material fixing structure 700, a cylindrical insert 70 is driven in advance into the screw hole 210 of the ceiling material 200, and a screw 50 is inserted into the insert 70 from the indoor side. When the distal end side is pressed and rotated with respect to the locking member 40, a screw hole 41 is formed in the locking member 40 and is screwed as it is, whereby the ceiling material 200 is fixed to the locking member 40.

  Since the distal end side of the insert 70 is in contact with the locking member 40 via the outer liner, when the screw 50 is tightened, it becomes impossible to tighten when the head 53 comes into contact with the proximal end side of the insert 70. It is possible to prevent the head 53 of the screw 50 from sinking into the ceiling material 200. Moreover, since the insert 70 is driven in advance, the position where the screw 50 is screwed is easily visible, and the workability is also good. Note that the length of the insert 70 (the length in the axial direction) can be set according to the thickness of the ceiling material 200.

Next, in the ceiling material 200x shown in FIG. 13, per unit area of the material forming the core part 101x (corresponding to the plurality of middle cores 10, 11a, 11b and the plurality of middle liners 12a, 12b shown in FIG. 6). a mass is 180 g / m ^2, forming an outer liner 13ax, the mass per unit area of the material forming the 13bx with corrugated cardboard sheet is 210g / m ² (or ^{320g / m 2, 440g / m} 2) Has been. With such a configuration, since the front and back surfaces of the ceiling material 200x are hardened, as shown in FIG. 7, when the ceiling material 200x is attached to the locking member 32 using the screws 31, the heads of the screws 31 are It is possible to suppress sinking into the ceiling material 200x.

  Next, in the ceiling material 200y shown in FIG. 14, by attaching a frame-shaped frame material 80 made of synthetic resin to the peripheral portion thereof, the entire periphery of the peripheral portion is surrounded by the frame-shaped frame material 80, A plurality of screw holes 81 are formed in the frame-shaped frame member 80. With such a configuration, as shown in FIG. 15, when the ceiling member 200 y is attached to the locking member 40 to form the ceiling member fixing structure 800, when the screw 50 inserted through the screw hole 81 is tightened, It is possible to prevent the head 53 of the screw 50 from sinking deeper than a predetermined position. The inner peripheral surface of the screw hole 81 of the frame-like frame member 80 shown in FIG. 14 has a head 53 protruding from the surface of the frame-like frame member 80 when the screw 50 is tightened as shown in FIG. It has a bowl shape (not shown) that can be embedded without any problems.

  The ceiling material fixing structures 400, 500, 600, 700, and 800 described above are examples of the present invention, and the ceiling material fixing structure of the present invention includes these ceiling material fixing structures 400, 500, 600, 700, and 800. It is not limited to.

  The ceiling material and ceiling material fixing structure according to the present invention can be widely used in the field of the construction and construction industry as materials constituting the ceiling portion in various buildings and construction techniques thereof.

10, 11a, 11b Core 13a, 13b Outer liner 20 Frame member 30 Suspension member 31 Screw 32, 40 Locking member 41, 210 Screw hole 50, 56 Screw 51 Sleeve 52 Screw portion 53 Head portion 54 Tip screw portion 55 Thick diameter Part 60 sleeve 61 taper part 70 insert 100, 200, 200x, 200y, 300 ceiling material 101, 101x core part 102, 202, 302 corrugated board material 102a step part 103 aluminum foil 301 hinge part 302a end face 303 sheet material 400, 500, 600,700,800 Ceiling material fixing structure S Rolling

Claims (10)

  It is a ceiling material in which the front surface, the back surface, and the peripheral end surface of a corrugated board material provided with an outer liner adhered to the core material portion constituting the hollow air layer and the front surface and back surface of the core material portion are covered with a noncombustible material. A ceiling material, wherein a mass per unit area of a material forming the outer liner is equal to or more than a mass per unit area of the material forming the core part. The mass per unit area of the material forming the core part is 100 to 180 g / m ² , and the mass per unit area of the material forming the outer liner is 180 to 500 g / m ^2. The ceiling material described.   The ceiling material according to claim 1 or 2, wherein the core material portion is formed by alternately laminating a core and a liner.   The ceiling material according to any one of claims 1 to 3, wherein the corrugated board material is provided with a stepped step portion at a peripheral edge thereof.   The ceiling material according to any one of claims 1 to 4, wherein a hinge portion that can be bent in a hinge shape is provided on a part of the corrugated board material, and an end face of the corrugated board material facing the hinge portion is covered with a noncombustible material. .   The ceiling material according to any one of claims 1 to 5, wherein the non-combustible material is an aluminum foil.   The ceiling material which stuck the decorative paper or the decorative film on the at least single side | surface of the ceiling material in any one of Claims 1-6.   The ceiling material which attached the frame material to the peripheral part of the ceiling material in any one of Claims 1-7. The peripheral part of the ceiling material according to any one of claims 1 to 8 is brought into contact with a locking member disposed in a substantially horizontal direction on a ceiling portion of a room of a building from the indoor side, and the engagement member is moved from the ceiling material to the engagement member. In the structure of fixing the ceiling member to the locking member with the screw member by screwing the screw member toward the stop member,
The stopper which prescribes | regulates the screwing depth of the axial direction of the said screw member with respect to the said locking member between the said locking member and the said screw member, between the outer periphery of the said screw member, or the said locking member was provided. A ceiling material fixing structure characterized by that.   As the stopper, any of a cylindrical sleeve interposed between the screw member and the screw hole, a large diameter portion formed on the outer periphery of the screw member, or a cylindrical insert arranged on the inner periphery of the screw hole The ceiling material fixing structure according to claim 9, wherein the ceiling is provided.

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